package com.ly.quartz.util;

import com.ly.common.constant.ScheduleConstants;
import com.ly.common.exception.job.TaskException;
import com.ly.quartz.domain.SysJob;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;

/**
 * 定时任务工具类
 * @author ruoyi
 */
public class ScheduleUtils {
    /**
     * 得到quartz任务类
     * @param sysJob 执行计划
     * @return 具体执行任务类
     */
    private static Class<? extends Job> getQuartzJobClass (SysJob sysJob) {
        boolean isConcurrent = "0".equals ( sysJob.getConcurrent () );
        return isConcurrent ? QuartzJobExecution.class : QuartzDisallowConcurrentExecution.class;
    }

    /**
     * 构建任务触发对象
     */
    public static TriggerKey getTriggerKey (Long jobId, String jobGroup) {
        return TriggerKey.triggerKey ( ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup );
    }

    /**
     * 构建任务键对象
     */
    public static JobKey getJobKey (Long jobId, String jobGroup) {
        return JobKey.jobKey ( ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup );
    }

    /**
     * 创建定时任务
     */
    public static void createScheduleJob (Scheduler scheduler, SysJob job) throws SchedulerException, TaskException {
        Class<? extends Job> jobClass = getQuartzJobClass ( job );
        // 构建job信息
        Long jobId = job.getJobId ();
        String jobGroup = job.getJobGroup ();
        JobDetail jobDetail = JobBuilder.newJob ( jobClass ).withIdentity ( getJobKey ( jobId, jobGroup ) ).build ();

        // 表达式调度构建器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule ( job.getCronExpression () );
        cronScheduleBuilder = handleCronScheduleMisfirePolicy ( job, cronScheduleBuilder );

        // 按新的cronExpression表达式构建一个新的trigger
        CronTrigger trigger = TriggerBuilder.newTrigger ().withIdentity ( getTriggerKey ( jobId, jobGroup ) )
                .withSchedule ( cronScheduleBuilder ).build ();

        // 放入参数，运行时的方法可以获取
        jobDetail.getJobDataMap ().put ( ScheduleConstants.TASK_PROPERTIES, job );

        // 判断是否存在
        if ( scheduler.checkExists ( getJobKey ( jobId, jobGroup ) ) ) {
            // 防止创建时存在数据问题 先移除，然后在执行创建操作
            scheduler.deleteJob ( getJobKey ( jobId, jobGroup ) );
        }

        scheduler.scheduleJob ( jobDetail, trigger );

        // 暂停任务
        if ( job.getStatus ().equals ( ScheduleConstants.Status.PAUSE.getValue () ) ) {
            scheduler.pauseJob ( ScheduleUtils.getJobKey ( jobId, jobGroup ) );
        }
    }

    /**
     * 设置定时任务策略
     */
    public static CronScheduleBuilder handleCronScheduleMisfirePolicy (SysJob job, CronScheduleBuilder cb)
            throws TaskException {
        switch ( job.getMisfirePolicy () ) {
            case ScheduleConstants.MISFIRE_DEFAULT:
                return cb;
            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES:
                return cb.withMisfireHandlingInstructionIgnoreMisfires ();
            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED:
                return cb.withMisfireHandlingInstructionFireAndProceed ();
            case ScheduleConstants.MISFIRE_DO_NOTHING:
                return cb.withMisfireHandlingInstructionDoNothing ();
            default:
                throw new TaskException ( "The task misfire policy '" + job.getMisfirePolicy ()
                                                  + "' cannot be used in cron schedule tasks", TaskException.Code.CONFIG_ERROR );
        }
    }
}
